Automatic damper.



wiv. COATE. AUTOMATIC DAMPER.

APPLICATION FILED MAR. 9. I917. L255fi9n Patented Feb. 5,1918.

2 SHEETS-SHEET I.

WILLIAM sami." ooArE, or enema; emu.

error/term DAMPER.

Specification of Letters Patent.

Patented Feb.5,'1l9il&

Applicatidnfiled March 9, 1917. Serial No. 153,682.

To all whom it may concern Be it known that I, WVILLIAM VVERN'AL COATE, a citizen of the United States, residing at Celina, in the countyof Mercer and State of Ohio, have invented certain new and useful Improvements in Automatic Dampers, of which the following is a specifi cation.

This invention relates'to automatic dampers and its object is to provide a device of novel and simple construction whiclrmay be easily adjusted and which, when properly applied, will maintain adesired degree of heat within a heating plant. The invention seeks 'to provide an arrangement whereby the workingparts will be prevented from injury through accidental blows and may be accurately adjusted'wlien desired.

The invention is illustrated in the accom .panying drawings and resides in certain novel features which will be hereinafter first fully deseribed'and then more particularly pointed out in the claims following the description.

Figure 1 is a'front elevation of the apparatus;

Fig. 2 is asimilar view of the casing;

Fig. 3 is a vertical section of the casing, the damper plate being shown removed and in edge elevation;

Fig. 4 is a vertical sectionof the complete apparatus;

Fig. 5 is'a horizontal section;

Fig. 6 's a detail group perspective of th dial and the parts cooperating therewith;

Fig. 7 is a detail view of the observation door,

In'carrying out my invention, I provide a casing 1 which is of asuitableshape to permit the necessary oscillation of the damper and-the partsimme'diately adjacent the'same and also to'providea continuous passage through the casing andthe abutting members of the smoke pipe or flue. The upper'end of tlllS casing 1s circular to fit within an upper section of the'smoke "pipeand isprovided'with an external bead or shoulder-2 to "prevent buckling of the 'joint while the lower end of-the casing'fits overa lower-"section of the "smoke pipe and is provided with an internal rib or bead 3 "to prevent "buckling andalsoto 'form a suplge efthe' sinoke pipe section. One sideQof and shaped toprovide an angular frame it upon which is fitted a convex hood 5. The side walls 6 of the frame 4 diverge outwvardly, as shown most clearly in Fig. 5, so that when the hood is slid downwardly in engagement with the sides of the frame, the parts will fit tightly so that the hood can not fall away from the casing, it being understood that the hood is constructed with correspondingly formed portions to effect a dovetailed engagement with the walls 6. To attain this result, the side edges of the hood are provided with inwardly extending webs or flanges 7 which bear against the flattened portions of the casing which define the frame t. At theinner edges of the webs or flanges 7 are outwardly diverging ribs 8 which on gagethe walls 6 of the frame i, as shown clearly in Fig. 5. Thelower end of the hood is open,-as'shown at 9, and may be readily engaged over-the upper end of the frame 4 so that; the hood'may beslid downwardly into position. The downward movement of thehood islimited by-atransverse internal shoulder 10whieh engages and rests on the top 11 oftheframe 4 and thereby supports the hood as will bereadily understood on =reference to 'Fig. i. The hood is provided 'at its center wlth a glazed swinging door 12 side edges of the damper plate are reduced below their centers to provide shoulders 15 and these shoulders are beveled toproduce a knife edge adapted to rock upon the bearings or shoulders 16 upon the sides of the opening in tlie frame 4:, as will be readily understood. It will be seen at once that'this arrangement snpportsthe damper so that it may rock very easily and, consequently, will be very sensitive to variations in the draft and to variations in the adjustment of the controlling weight or dial. Projectinginwardly from the inner or rear face of the damperjs a governorbar-or rod 17 which is .ipreferably -n1ade-integral with the damper and hasits extremity or freeend expanded in a disk-like form to acquire weight, as shown at 18, whereby said arm willtend-to hold the damper in a vertical position. An

opening 19 through the member 18 increases the radiating surface of the bar and so tends to prevent the holding of heat'in the bar.

' jProjecting-from-the front or outer face of the damper is a shaft 20 having a thread or spiral bead 21 formed thereon and also being constructed with. a longitudinal groove 22, asshown. The dial or regulating plate 23 is fitted upon the shaft 20 and ispro- ",vided with a groove 24 in its bore to engage the bead 21 on the shaft 20, as will be readily understood: .The dial is provided with a knob or lug 25 to facilitate its rotation and also to limit its movement to one'complete revolution by engaging with the hand'or pointer 26 which is disposed in front of the dial and bears normally against the. same. The dial is provided around its edge wlth graduations 27 and the end of the hand or indicator 26 is arranged to ride over said' graduations. It will be, noted that thedial is of a conical formation and the indicator is, therefore, disposed at an angle to the shoe 28 by which it is carried. This shoe is of such dimensions thatit'will fit within the groove 22 of the shaft 20 and lie'flush with --the outer circumference of the said shaft,

the inner endof-the shoe extending through the bore of the dial and being provided with a lip .29 projecting up in rear of the dial and bearing against the rear side of the same. It will be readily seen that if the dial bexrotated, its engagement with the bead21 will cause it to move longitudinally of the shaft 20 and the pointer will, of course, be caused to travel longitudinally of the groove 7 .22 but will be prevented by the walls of said groove from rotating around said shaft with V the dial. The dial can, therefore, be turned "so as to bring any deslred graduation immediately adjacent the end of the indicator 7 and, consequently, set the damper for any desired degree of heat, Inwardly from the scale or graduations a plurality of notches,

admit cold air to the hood;

' -lugs, or corrugations '30 are provided upon the outer face of the dial' concentric ..there-' with whereby as the dial is rotated, the said corrugations will be caused to move under The door 12 consists of a ring; properly "shaped to fit close over'an annular..ridgeprhigher degree of heat sufficient force is applied to the lugor stop to rotate the dial; The rotation of the dial will cause wit-to V V "brought under :the indicator when the dial tendency torock in its bearings,this regula tron ad usting the damper totheyheightor zi 'slze of thechimney. .Thedial is theniro'tated casing lip 33 on the outer sidelof thehood-and'defining the-door opening, a convex glass 3d being set into the ring. At one side the ring is provided with aloop or eye 35 adapted to fit between similar eyes. on a bracket 36 whichis secured on the hood, a pin 37 being inserted through the eyes and having a threaded engagement-with theiowermost eye to establish a hinged connection, the

parts ofwhich will not separate. -At itsopposite side, the ringer door frame 12 is pro: vided with a lug orprojection 38 adapt'e d to a rideover theserrated upper'edge'of a plate 139 projecting from thehood thereby holding the door firmly.

The parts are so arranged "and'proportioned that when the indicator 26 is atzero on the scale 27, the dial will be at-the outer. end of'the shaft 20 andto set the damper for travel inwardly upon the shaft 20 until the v designation ofthe desired degree of heat is i '90 may be permitted to rest. One revolution of. the dial will bring the :lug 25 against-the indicator so-that the movement "will be lim 1 ited to the scopeof thescale. As the dial; passes under theindicaton-the nib 40 thereon rides over the corrugations 3 0 and by its engagement therewith holds the dial'in any r position in which it' may be set.

' Whenapplying the device, Jule dialwiszarranged at the outer end of the shaft 20' andthe damper-plate13Lshouldthenrassume aim vertical position and fill the openingin'the V frameLi Theset screwj3rlis thenadjusted in'or out until the damper plate shows a to set it to the degree of heat desiredi It is well known that {hot air, andgases V tend tofriseand this tendency increases with the temperature. \Vith the dial set atzfejro,

the damper assumes, a vertical position and f is balanced so that, any increase of tempera:

ture within the casing will createa suction v V .at'the lnner 'side of the damper and permit it to yield to the pressuregof theI'GQld air flowing throiighxthelowierend of thehood. i

This. cold air-will then, ofcourse, flow past r the damper into the casingand check the draft. 'If'the dial beset'eloser to the'damper, 1

the governor farm will overbalance the; damper, and tend; to hold it e in closed posie tion so:that a greater (Inference inrthejtemperature's at the; opposite s ides of the damper :will beyneeded.to=permit it to'openr The difference will, of course, 'becomeggreater as:

- the dialis-set closer 'tothe damperiand, (2011- j v sequently, the farther in the dialis movedthe hotter 'the'rising gases willIbefpermitted-to I Having thus described the invention, What is claimed as new is:

l, The combination of an open frame having outwardly diverging side walls, a hood having inwardly extending webs bearing upon the frame adjacent the side Walls thereof and having outwardly diverging ribs at the inner edges of said Webs to engage the said side walls, the hood being further provided With an internal transverse shoulder near its upper end to rest on the top of the frame, and a damper mounted between the sides of the frame for rocking movement.

2. A damper comprising a plate mounted for rocking movement, a governor arm projecting rearwardly from said plate, a shaft projecting forwardly from the plate, a regulating dial rotatably and slidably mounted upon the shaft, and an indicator cooperating with said dial.

3. A damper comprising a plate mounted for rocking movement, a governor arm projeeting rearwardly from the said plate, a shaft projecting forwardly from the plate, a regulating dial mounted on said shaft to rotate about the same and move longitudinally thereon, and an indicator movable along the shaft with the dial but held against rotation.

4. A damper comprising a plate mounted for rocking movement, a governor arm projecting rearwardly from the plate, a shaft extending forwardly through the plate and provided with a longitudinal groove, a regulating dial fitted upon the shaft to rotate about the same and move longitudinally thereof, and an indicator fitting closely to the dial and constructed with a shoe slidably mounted in the groove in the shaft and having an upturned end engaging the rear side of the dial.

5. A damper comprising a plate mounted for rocking movement, a governor arm projecting rearwardly from the plate, a shaft extending forwardly from the plate, a regulating dial rotatablv and slidably mounted on the shaft, an indicator movable along the shaft with the dial but held against rotation about the shaft, and holding devices mounted on the dial to engage the indicator.

In testimony whereof I affix my signature.

WILLIAM VERNAL GOATE. [L- s.[

Copies of this patent may be obtained for five cents each, by addressing the Commissi'oner of Eatents,

' Washington, D. G. 

